Which language or frameworks is RuntimeError.net compatible with?

How is it different from Airbrake or Exceptional?

We send the errors directly to your project management tool. You can manage the errors directly from your project management tool instead of opening a separate web application just for errors. Otherwise, we are largely similar to Airbrake or Exceptional.

Are repeat errors de-duplicated?

Yes. We don't send you repeated errors. An email notification gets sent to you immediately when an error occurred the first time. We also create Github issues
for the error. For subsequent errors, we do not send you any notifications or create new Github issues.

How do I close an error?

You should close them from your project management tool (Github). No need to open a separate web application just for managing errors.